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Optimal nitrogen fertilization of boreal conifer forest

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Figure

Fig. 1 Growth response of spruce stand when the nitrogen dose is 100, 200, 300 or 400 kg ha-1
Fig. 2 Effect of parameters a1 and a2 of Equation 2 on the thinningintensity of different diameter classes
Fig. 4 Effect of fertilization on the relative and absolute increase inNPV for four different stem quality classes
Fig. 5 Mean tree diameter and stand basal area at the moment of fertilization in the optimized management schedules
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